Ore-concentrator.



G. M. GROSS.

ORE CONGENTRATOR.

- APPLICATION FILED APR. 10, 190s. Rmmwnn JAN. 22, 1012. 1 ,035,8'74.

commun n mnnnAPH C0.. WASHINGTON. D. C.

GEORG-E IVI. GROSS, OF CHICAGO, ILLINOIS.

ORE-CONCENTRATOR.

Specification of Letters Patent.

Patented Aue". 20, 1912.

Application filed April 10, 1908, Serial No. 426,178. Renewed January 22, 1912. Serial No. 672,795.

To all whom t may concern:

Be it known that I, GEORGE M. Gross, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in OreConcentrators, of which the following is a specification.

This invention relates to that class of ore concentrators in which a circular concen-i trating table or pan containing a supply of ore mixed with water is given a combined slow rotation and rapid shaking motion to attain the desired concentration of the ore. And the present improvement has for its object to provide a simple and efficient structural arrangement and combination of parts by which a very effective separation or concentration of the ore is attained, with an automatic discharge of the lighter portions or tailings from the apparatus, all as will hereinafter more fully appear.

In the accompanying drawings z-Figure 1, is a central vertical sect-ion. Fig. 2, is a plan view of a part of the concentrating pan. Fig. 3 is a detail horizontal section on line www, Fig. 1.

Similar numerals of reference indicate like parts in the different views.

Referring to the drawings, 1 represents the supporting base provided with an upright bracket or standardhaving at its upper end a bearing hub 3 for the main driving shaft of the apparatus; an annular bearing collar t at the upper end of said hub for the idler gear hereinafter' described, and a bearing sleeve for a countershaft having a parallel relation to the main shaft aforesaid.

5 is the main driving shaft having bearing near its upper end in the hub 3 aforesaid, and at its lower end in a step bearing (i on the base 1. Such shaft is arranged in an upright position slight-ly inclined from a vertical line for the purpose hereinafter set forth, and at its upper end is provided with a wrist or crank pin 7 upon which is mounted the carrying hub or spider of the concentrating pan.

S is a power shaft having bearing in the standard 2 and carrying at one end a belt pulley, and at the other end a bevel gear 9 meshing with a bevel gear lO on the main driving shaft 5, such construction providing a ready means for imparting, from a suitable power source, rotation to the main driving shaft of the apparatus.

l1 is the spider upon which the concentrating pan is carried; such spider has a central hub 12 engaging the wrist pin 7 of the main driving shaft, and an annular rim 13 the interior of which is provided with gear teeth as shown.

14 is a bearing disk interposed between the hub l2 aforesaid and the top of the annular collar 4- of the supporting bracket Q, and intended to bear the frictional wear of the parts in continued use.

15 is the circular open top concentrating pan secured to the upper side of the aforesaid spider 11, and the sco-pe of the present invention embraces the use of any detail construction of pan employed in the present type of ore concentrators, in that the niate-y rial feature of novelty in the present improvement lies in an inclined arrangement of the pan and the operation of the same as so inclined and as hereinafter more particularly described. The preferred form however of the pan shown in Figs. 1 and 2 comprises a structural formation and arrangement of parts as follows :-1G is a cent-ral upwardly extending shell adapted to fit over a corresponding central portion of the carrying spider 11, aforesaid. 17 is an `annular pocket arranged outside the central shell 1G, and having an inclined outer wall 17 which is preferably formed with corrugations extending circularly as shown, and which are adapted to aid Ain the separation of the ore in the practical operation of the machine. 18 is a flat annular and slightly dished skirt surrounding the aforesaid pocket 17 and adapted to aid in the discharge of the water and lighter portions of the ore as tailings in the continued operation of the apparatus, such discharge taking place as serial portions of said skirt successively move into and out of a horizontal plane as the pan as a whole rotates in a plane oblique to the horizon. 19 are a series of radial partit-ions dividing the annular pocket aforesaid into a circular cluster of subpockets in which individual separation of the ore is effected. In the preferred construction of the pan, such partitions will extend to t-he margin of the skirt 18 to partition off the same, as shown in Figs. 1 and 2.

2O is a gear wheel loosely mounted on the annular bearing collar t aforesaid, with its teeth meshing with the teeth of the aforesaid internally geared annulus 13; such gear `wheel 20, has a less diameter than the annulus 13, the difference being represented by the eccentricity of the wrist pin 7, with which t-he aforesaid annulus 13 has operative engagement. The teeth of the gear wheel 20 are much wider than the teeth of the annulus 13 in order that a portion of the teeth of such gear wheel will extend below such annulus and be free for operative engagement with a toothed pinion now to be described.

2l is the toothed pinion, above referred to, carried on the upper end of a countershaft 22 that has bearing in a bearing sleeve 23 forming a part cf the standard 2 of the main frame; the said shaft having a parallel relation to the main shaft 5, as before stated.

24 is a cone pulley carried on the lower end of the countershaft 23, and adapted for belt connection with a complementary cone pulley 25 carried on the main shaft 5, the arrangement providing for a variable series of speeds between the shafts carrying the cone pulleys.

The operation of the present mechanism is as follows Rotary motion being iinparted to the main shaft 5, the same through its wrist pin 7 imparts a series of rapid rotations to the spider and the concentrating pan carried thereon, in an orbit concentric to the axis of the main shaft, and simultaneous with the hereinafter described slow rotation of the spider and concentrating pan around the axis of the main shaft.

Other than the wrist pin connection above described, the spider and pan are loosely mounted on the top of the main frame, and are moved around with the teeth of the annulus 13 coming in contact with the teeth of the gear wheel 20, to effect a slow rot-ation of the annulus with its spider and the pan in an opposite direction to that in which the aforesaid gear wheel 20 is driven and in consequence of which the concentrating pan receives the above mentioned secondary series of small and rapid secondary rotations in an orbit concentric with the axis of the main shaft, while said pan is making a single main rotation around the axis of said main shaft. Such gear wheel 2O could be fixed against any rotation, and constitute a fulcrum for the annulus 13, to attain the movements above set forth of the concentrating pan, but the main rotation of the pan, as compared with its number of secondary rotations, would be too rapid for attaining the proper concentration of many varieties of ores. And for such reason the said gear wheel 2O is made to rotate, and rotation at various speeds imparted thereto in a reverse direction by means of the countershaft 22 and cone pulleys 24 and 25, to attain a great many secondary rotations of the concentrating pan while the same is making one complete revolution.

A material part of the present invention in connection with. the slow main rotation and rapid secondary rotations ofthe pan, comprises an inclined arrangement of said pan, so that at all times one side of the pan will be at a low or discharge point, and so that as successive portions of the pan reaches such low point the wat-er and lighter portions will automatically discharge as tailings therefrom.

@ne or more complete revolutions of concentrating pan may be used in the concentration of a charge of ore, and when properly concentrated, the concentrates will be removed from the cluster of sub-pockets 17, by a dipper suction hose or other ordinary appliance.

Having thus fully described my said inventio-n what l claim as new and desire to secure by Letters Patent, is

1. In an ore concentr ator, the combination of a main frame, a concentrating pan mounted to rotate in an oblique plane thereon, and means for imparting a slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

2. 1n an ore concentrator, the combination of a main frame, a concentrating pan mounted to rotate in an oblique plane thereon, and provided with an annular pocket, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

3. In an ore concentrator, the combination of a main frame, a concentrating pan .mounted thereon and provided with an annular pocket having an inclined outer wall, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

4t. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with a series of radial partitions, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

5. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with an annular pocket and a series of radial partitions, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit uconcentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

6. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with a series of radial partitions and an annular pocket having an inclined outer wall, and means for imparting slow main rotation and rapid seeondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

7. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with an annular pocket and a flat circular and slightly dished skirt surrounding said pocket, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

8. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with an an nular pocket, a series of radial partitions, and a fiat circular and slightly dished skirt surrounding said pocket, and means for imparting slow main rotation and rapid see- 'ondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

9. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with an annular pocket having an inclined outer wall and a flat. circular and slightly dished skirt surrounding said pocket, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

10. In an ore coneentrator, the combination of a main frame, a concentrating pan mounted thereon and provided with a series of radial partitions, an annular pocket having an inclined outer wall and a flat circular and slightly dished skirt surrounding said pocket, and means for imparting slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, substantially as set forth.

11. In an ore concentrator, the combination of a main frame, a concentrating pan mounted thereon, and means for imparting a slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, the same comprising a main shaft, a gear wheel mounted in concentric relation to said shaft, an internal gear carried by the concentrating pan in eecentric relation to the axis of said shaft and meshing with said gear wheel, and operative connections between the main shaft and the pan, substantially as set forth.

12. In an ore eoncentrator, the combination of a main frame, a concentrating pan mounted thereon, and means for imparting a slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow r0- tation of the pan, the same comprising a main shaft, a gear wheel mounted in concentric relation to said shaft, an internal gear carried by the concentrating pan in eccentric relation to the axis of said shaft and meshing with said gear wheel, an operative connection between the main shaft and the pan, a countershaft, a pinion carried by said counter-shaft and having engagement with the aforesaid gear wheel, and an operative connection between the eountershaft and the main shaft, substantially as set forth.

13. In an ore eoneentrator, the combination of a main frame, a concentrating pan mounted thereon, and means for imparting a slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow rotation of the pan, the same comprising a main shaft, a gear wheel mounted in concentric relation to said shaft, an internal gear carried by the concentrating pan in eccentric relation to the axis of said shaft and meshing with said gear wheel, and operative connections between the main shaft and the pan, the same comprising a wrlst pin at the upper end of the main shaft and a pan carrying spider engaging said wrist pin, substantially as set forth.

14. In an ore coneentrator, the combination ofI a main frame, a concentrating pan mounted thercon,'and means for imparting a slow main rotation and rapid secondary rotations to the pan in a circular orbit concentric to the axis of the aforesaid slow r0- tation of the pan, the same comprising a main shaft, a gear wheel mounted in concentric relation to said shaft, an internal gear carried by the concentrating pan in eccentric relation to the axis of said shaft and meshing with said gear wheel, an operative connection between the main shaft and t-he pan, a countershaft, a pinion carried by said counter-shaft and having engagement with the aforesaid gear wheel, and cone pulleys on said countershaft and main shaft adapted to receive a power transmission belt, substantially as set forth.

Signed at Chicago, Illinois, this 3rd of April 1908.

GEORGE M. GROSS.

day

lVitnesses ROBERT BURNS, HENRY Mon.

Copies of this patent may be obtained for ive cents each, by

addressing the Commissioner of Patents,

Washington, I). C. 

